SECRET CONVERSATIONS BY RADIO “SUPERPHONE” (Oct, 1923)
SECRET CONVERSATIONS BY RADIO “SUPERPHONE”
The apparently impossible feat of transmitting conversation while confining it to the speaker and the person for whom it is intended has been accomplished recently in Washington. It was done by a combination of the “superphone,” the invention of Maj. Gen. George C. Squier, chief signal officer of the army, and the principle of using electric light or telegraph wires, as in the receiving station at Chatham. Cape Cod.
“Wired wireless” and high-frequency alternating current traversing telegraph or light wires, are used in connection with an ordinary microphone at the trans-mining end. The message is picked up by radio instruments and directed into a telephone receiver at the other end. A number of conversations may be carried on simultaneously over the same wires. Where secrecy is important, as in military or business matters, the invention’s value is apparent.